This bugreport has been closed because it does not contain enough
information for developers to be able to fix the issue.
The developers have asked for more information in the comments.
If the issue still occurs with the latest MyPaint version, please
file a new bug that includes as much of the requested information
as possible.

From your traceback it may have to do with the "restore color" or "save color" brush setting, but this setting seems to work fine in git. Can you attach the brush that you have selected? You should find it in "~/.mypaint/brushes/b002.myb".

Can you maybe try to figure out what exactly you have to do to produce the exception? Bugs like that don't happen at random, usually.

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